This application contains Mathematics lessons for fourth graders, summaries of all lessons, exercises and corrected homework without Internet.
Great summary that helps you understand lessons while memorizing them quickly.
An application that works without the need for the internet and eliminates a pile of paper. You can use this app anywhere without needing a booklet or the like.
Complete summary of all fourth grade Mathematics lessons.

Summary:

1 Operations on relative numbers
2 Numbers in fractional writing
3 Powers
4 Literal calculation
5 Equations
6 Proportionality
7 Homework 1st Semester
8 Statistics and probabilities
9 Transformations of the plane: translation and rotation
10 Pythagorean theorem
11 Right triangle and circumscribed circle
12 Distance and tangent: Bisector and inscribed circle
13 Geometry in space (Pyramids and cones of revolution)
14 Homework 2nd Semester

This is a Summarization for educational purposes, not a book so there is no copyright violation.